Condenser



y 1936- I M. H. BENNETT 2,039,623

CONDENSER Filed Aug. 11, 1932 I V g P I m m mmmmmm INV TOR Patented May5,193 2,039,623-

UNITEDVSVTATES PATENT OFFICE 2,039,623 CONDENSER Morris H. Bennett,Prospect, Com, assignor to Scovill Manufacturing Company, Waterbury,Conn, a corporation of Connecticut.

Application August 11, 1932, Serial No. 628,287

4 Claims. (01. 115-415) The present invention'relates to multiple platea pair of spaced apart circular apertures havair dielectric condensers,particularly though not ing a smaller diameter than the diameter ofexclusively adapted foruse in radio circuits. balls 22 cooperating withthese apertures. Se-

An object of the present invention is to provide cured to the sides l2of the condenser frame or 5 improved means for holding and maintainingin channel member are holding plates 2| which may 5 predeterminedposition a group or a plurality of be secured in position upon thechannel member groups of stator plates. I by screws 26 threaded in theside walls l2 of the Another object of the invention is to providechannel member or condenser frame. The inconnection therewith means forinsulating the shanks of the screws 25 pass through openings statorplates such that the leakage path is de- "28 in the holding plates 24.These openings may 10 creased while, at the same time, only a small becircular or elongated and in any event are 'amount of insulatingmaterial is employed in preferably larger when measured across their theelectrostatic field. smallest dimension than the shanks of the A furtherobject of the invention is to provide screws 26, the heads 30 of thescrews being large means for mounting the stator plates such that enoughto hold the plates 24 to the condenser 15 they can be adjusted intopredetermined posiframe.

tion with respect to cooperating rotor plates, the The upper portion ofeach plate 24 as herein construction being such that it may be rapidlyshown is provided with a pair of spaced apart assembled, and, whenassembled, maintains the circularapertures 32-, whose diameter is lessthan stator plates rigidly in assembled position. the diameter of theballs 22, of insulating mate- Other objects of the invention will appearfrom rial;

the following description taken in connection As shown in Figure 2, theholding plates 24 with the acc mpanying drawing which illustrates bearagainst the balls 22 in line contact thereby way of example a preferredembodiment of with, a po i each ba entering its c p r- 25 the invention,and in which,- ating opening 32. Opposite the openings 32, the 25 Figure1 is a top plan view of a portion of 9. balls similarly enter partly inthe openings, prefgang condenser intermediate the ends thereof erablycircular, provided for them in the channel and showing a plurality ofgroups of stator plates portion 2|! of the stator plate mounting stripl6.

, mounted andheldin position inaccordancewith AS a sult f the cfl mdescribed, the

the present invention; insulating balls 22, which may be relativelysmall, 30

Figure 2 is a vertical transverse sectional vie have circular-linecontact with the stator plate on the line 22 of Figure 1; mounting stripl6 and with the holding plate, 24.

Figure'3 is a perspective detail view on an en- The Parts r Propbrtioned30 that, when y larged scale, showing one'of the'holding plates; r n theassembled Position 01 Figures 1 n Figure 4 is afragmentary transversesectional the holding plates exert a pressure against the 35 view of amodified form of the invention; andinsulating balls, this pressure beingexerted by Figure 5 is a fragmentary perspective view of each Plate 24 Wthe Otherpart of one of the frame sides. Referring to Figure 4, theframe is shown as a Referring in-detail to the drawing, the conchannelmember having a bottom II and com- 40 denser shown includes a channelmember having Dresion m mber sides ii. The sides 24' are 40 a bottom IIand sides l2. Three groups of stator preferably cut as shown in Figure 5or otherwise. plates with cooperating rotor plates are shown, to prov dean a m I. o pa 0! arms, p ovided though it will be understood that thenumber of with openinss similar to p i s 32 and groups and the number ofplates in each group serv n the m P The balls thus may be varied.Between each group of cooperbear against the channel member It about the45' I ating plates is a shield ll secured to the channel edges f theball Openings in the channel P r i n 'member and preferably extendinglaterally 20'. The stator plates may be staked to the yond the de wallsl2 of the channelmem r. channel member It as indicated at IS.

The state. :plates of each group are secured withthis construction,compression is exerted a metal strip I! by being staked thereto as shownas bef r n f n w-r 8 7, the 811118 50 m y b in Figure 2 at IS. The metalstrips I are a h bent with respect to the frame to insure the deprovidedwith a laterally projecting and longitusired compression and maintenanceof the stator dlnally extending channel-2| and the-vertical plateassembly or assemblies in predetermined faces of these channels, in theembodiment of "position.

I thelnvention hereinillustratedareprovided with witntheiconstructiondescribed. the leakage Q path has been, made relatively small while, atthe same time, only a relatively small amount of insulating material hasbeen employed; also assemblyofthepartsisrelativelysimpleandcan beaccomplished with adjustment of the stator plates in their finalpredetermined position; further, the construction is such thatcompression is produced by the holding plates which are themselvesrigidly mounted, so that each stator plate group when assembled is, inuse, maintained permanently in predetermined position.

What is claimed is:

1. In a condenser, a frame having sides, a group of stator plates, agroup of rotor plates interleaved therewith, and means for mounting thestator plates in the frame comprising opposed assembly members to whichsaid stator plates are secured in permanent predetermined spacedrelation to each other, each of said as sembly members having a channelportion and each having spaced openings in the channel portion thereof,opposed holding plates adjustably secured to the frame sides and havingopenings therein spaced equally with arid in cooperative relation tosaid first named openings, and insulating mounting devices each of whichbears partly against the edge of an opening in the holding plate andpartly against the edge of an opening in said assembly member, saidinsulating mounting devices being larger than their cooperating openingsand extending partly into each of their cooperating openings, and saidopposed holding plates exerting pressure towards :each other throughsaid insulating mounting devices and said stator unit.

2. In a condenser, a frame having sides, a group of stator plates, agroup of rotor plates interleaved therewith and means for mounting thestator plates in the frame comprising opposed assembly members to whichsaid stator plates are secured in permanent medetermined spaced relationto each other, each assembly member having a channel portion and eachhaving spaced openings in the channel portion thereof, opposed holdingplates adjustably secured to the frame sides and having openings thereinspaced equally with and in cooperative relation to said first namedopenings, and insulating balls each ofwhichbearspartlyagainsttheedgeofanopening in the holding plate and partly againsttheedgeofanopeninginthecooperatingassembly member, the balls beingoflarger diameter than said openings and said opposed holding platesexerting pressure towards each other through said halls and said statorunit.

3.Inagangcondenser,aframehavingsubstantially parallel sides, a pluralityof groups of stator plates, a group of rotor 'plates interleaved witheach group of stator plates, and means for mounting each group of statorplates in the frame comprising a pair of channeled assembly memberssecured to said stator plates along opposite edges of said plates andholding said plates in permanent predetermined spaced rela-- tion toeach other, each assembly member having at least two circular openingsin the channel portion thereof, a holding plate for each channeledassembly member, eachholding plate having a portion provided with screwreceiving openings, screws in said openings of smaller diameter thansaid openings and adjustably securing the holding plate to the framesides, each holding plate having an oifset portion provided with a pairof circular openings spaced equally with and in cooperative relation tosaid first named openings, and insulating balls each of which bearspartly against the edge of an open- 'ing in the offset portion of aholding plate and partly against the edge of an opening in thecooperating channeled assembly member, the balls being of largerdiameter than said openings and said holding plates exerting pressuretowards each other and against the stator plates, said pressure beingthrough said balls and the channeled portions of said assembly membersand said stator unit.

4. In a condenser, a frame having sides, a group of stator plates, 8.group of rotor plates interleaved therewith, and means for mounting thestator plates in the frame comprising opposed assembly members to whichsaid stator plates are secured in permanent predetermined spacedrelation to each other, each of said assembly members having a channelportion and each having spaced openings in the channel portion thereof,opposed holding plates adjustably secured to the frame sides and havingopenings therein spaced equally with and in cooperative relation to saidfirst named openings, and mounting devices each of which bears partlyagainst the edge of an opening in the holding plate and partly againstthe edge of an opening in said assembly member, said mounting devicesbeing larger than their cooperating openings and extending partly intoeach of their cooperating openings, said opposed holding plates andmounting devices comprising insulation to low-- late the stator from theframe, and said opposed holding plates exerting pressure towards eachother through said mounting devices and said stator unit.

MORRIS n. BENNETT.

